scholarly journals Differences in Physicochemical Properties of Soils under Oil Palm Plantations of Different Ages in Ohaji/Egbema, Imo State

2017 ◽  
Keyword(s):  
Physicochemical Properties ◽  
Oil Palm ◽  
Imo State ◽  
Different Ages ◽  
Physicochemical Properties Of Soils

scholarly journals DYNAMICS IN PHYSICOCHEMICAL PROPERTIES OF SOILS UNDER OIL PALM PLANTATIONS OF DIFFERENT AGES

2021 ◽  
Author(s):  
Olufemi Osinuga
Keyword(s):  
Physicochemical Properties ◽  
Oil Palm ◽  
Forest Cover ◽  
Sandy Loam ◽  
Soil Surface ◽  
Available Phosphorus ◽  
Different Ages ◽  
Research Findings ◽  
Mulch Cover ◽  
Physicochemical Properties Of Soils

Removing forest cover for oil palm plantations has raised questions about climate change problems and debates and their associated impacts. The design of the pruned fronds of the trees does not make them ideal for use as mulch cover on the entire farm, but they are heaped between the plant rows. This research investigated the changes in the physicochemical properties of soils under oil palm plantations of different ages. Soil surface (0-20 cm) and subsurface (20-40 cm) samples have been obtained from various ages of oil palm plantations (0-5, 5-10, 10-15 and, 15-20 years). Two distinct samples were taken on the same farm, under alleys and heaped pruned fronds. Soil samples used as a standard (control) were collected from adjacent forest land. Analyses of particle size showed that the soils were sandy loam to sandy clay loam texture soils. Bulk density was low and varied with age and depth. The soils were moderate to slightly acidic pH, relatively low organic carbon, total nitrogen, and available phosphorus contents. Based on the standard ratings, exchangeable bases and cation exchangeable capacity content were also low, while high percent base saturation was observed. Research findings have shown that the soil properties of different ages of oil palm plantations vary and should therefore be handled differently based on of their characteristics. Accumulation of organic residue on the floor of the plantations should be encouraged as this will help to increase organic matter levels.

QUANTIFICATION OF OIL PALM TREE LEAF PIGMENT (CHLOROPHYLL A) CONCENTRATION BASED ON THEIR AGE

2015 ◽  
Vol 75 (11) ◽  
Author(s):  
Norfazira Mustafa ◽  
Norsuzila Ya’acob ◽  
Zulkiflee Abd Latif ◽  
Azita Laily Yusof
Keyword(s):  
Chlorophyll A ◽  
Oil Palm ◽  
Nutrient Content ◽  
Mature Stage ◽  
Palm Tree ◽  
Tree Leaves ◽  
Chlorophyll A Concentration ◽  
Chlorophyll Pigments ◽  
Different Ages ◽  
Tree Leaf

The main pigments found in oil palm tree leaf are chlorophylls a, b, and c. Chlorophyll a converts light energy into chemical energy through photosynthesis process. The content of chlorophyll pigments varies by their ages. The aim of this research was to determine the concentration in chlorophyll a in different ages. This study is significant in oil palm fertilization for monitoring oil palm nutrient content (NPK). Chlorophyll measurement was done by extracting using methanol solvent and concentration measurement using spectrophotometric method in order to quantify chlorophyll a concentration based on their ages. 6 samples of oil palm tree leaves, collected from 2 different ages, were analyzed. The observed values were determined based on the absorbance at wavelength (670nm) and were calculated for concentrations value based on to the Lambert-Beer law Equation. It showed that the chlorophyll a concentrations at the age of mature stage had been higher than those at the old stage. The results depicted that the chlorophyll a concentration values at the mature stage were 0.33mg/ml, 0.32mg/ml, and 0.18mg/ml, while at the old stage were 0.22 mg/ml, 0.18mg/ml, and 0.06mg/ml.

scholarly journals Soil quality of the tea and apple-growing sites in Mindat District, Chin state, Myanmar: A preliminary study

2021 ◽  
Vol 70 (1) ◽  
pp. 27-40
Author(s):  
Yaung Kwee ◽  
Khin Soe
Keyword(s):  
Physicochemical Properties ◽  
Silty Clay ◽  
Subtropical Climate ◽  
Clay Loam ◽  
Silty Clay Loam ◽  
Preliminary Study ◽  
Phosphorus And Potassium ◽  
Very High ◽  
Physicochemical Properties Of Soils

In this study, two sites from tea and apple growing sites were collected from Pyay village and Nine Mile village, Mindat district, Chin state of West Myanmar under a humid subtropical climate. The results of physicochemical properties of observed soils were neutral pH, favorable moisture, silty clay loam texture, very high content of organic carbon, organic matter and total nitrogen. However, the tea growing soil was very poor in phosphorus and potassium content. Moreover, both soils lack of available potassium. The content of heavy metals in both soils was not varied from each other and followed the order: Fe (iron) > Cu (copper) >Zn (zinc) > Pb (lead) > Cr (chromium) and was below the maximum allowed concentrations (MAC). Therefore, the studied soils are generally favorable for cultivation under the condition of application of phosphorus and potassium fertilizers. However, due to the regular application of fertilizers and pesticides, it is necessary to monitor these soils for PTE levels. Further research is recommended, which must include analyses of the physicochemical properties of soils to a two depths of 0-30 and 30-60 cm, especially for the area where fruit plants are grown. In addition, higher density of soil samples and sub-samples are necessary to produce a reliable dataset that will allow proper statistical analysis.

THE EFFECT OF OIL PALM ASH INCORPORATION IN FOAMED CONCRETE

2015 ◽  
Vol 75 (5) ◽  
Author(s):  
Farah A. Hadi ◽  
Hanizam Awang ◽  
Muhammed Zuhear Almulali
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Oil Palm ◽  
Drying Shrinkage ◽  
Target Density ◽  
Concrete Mix ◽  
Different Ages ◽  
Foamed Concrete ◽  
Oil Palm Ash ◽  
Enhanced Properties

This paper investigates the effect of replacing different portions of cement by fine oil palm ash (FOPA). A target density of 1000 kg/m3 was used for the foamed concrete mixes. A foamed concrete mix of 1 part binder, 2 parts filler and 0.45 part of water has been used. Cement was replaced at levels of 25, 35, 45, 55 and 65% by weight of binder. The compressive strength, density, water absorption, drying shrinkage and sorptivity were tested at different ages. The mix containing 25% of fine OPA showed enhanced properties in comparison to the control mix at the age of 90 days. The mixed showed higher compressive strength, less water absorption, increased density and lesser sorptivity. However, the same mix showed higher shrinkage readings than that of the control mix. 

scholarly journals Impact of Small-Scale Mining Activities on Physicochemical Properties of Soils in Dunkwa East Municipality of Ghana

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Paul K. Essandoh ◽  
Mohammed Takase ◽  
Isaac Mbir Bryant
Keyword(s):  
Heavy Metals ◽  
Physicochemical Properties ◽  
Soil Quality ◽  
Soil Samples ◽  
Small Scale ◽  
Mining Activities ◽  
Soil Physicochemical Properties ◽  
Fallow Period ◽  
Physicochemical Properties Of Soils

The quality of soils in rehabilitated small-scale mined sites needs thorough investigation since a lot of changes do occur. The study assessed the impacts of small-scale mining activities on concentration and distribution of soil physicochemical properties and heavy metals. The soil samples were collected from 120 (50 m × 50 m) plots. The concentrations of soil physicochemical properties (Ca, Mg, Na, N, P, K, and OC and EC) varied significantly ( p  < 0.05) between unmined and mined soils. However, there were no statistically, significant differences ( p  < 0.05) observed in the concentrations of Cd, Hg, Pb, As, and Cu between the unmined and mined soils. Despite the generally poor (33.8%) soil quality in the study area, mining activities further reduced it by 24.2%. Soils from mined sites with unfilled/partially filled pits had higher levels of K, Mg, and Na. As mined sites fallow period increased, concentrations of OC and Cd increased, while Ca, Mg, pH, Cu, Pb, and As and value of EC decreased. The number of years that mined land remained fallow, and whether the pits were filled or unfilled during this period should be factored into the mined land rehabilitation processes.

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